Someone else posted this and I can't remember who so I can't give him credit, but this info wasn't my own. So I'll put it in quotes. "According to the contract between bungie and activision, that is public due public record laws. A new game comes out every other year, with 4 DLCs each. So four games total, 60 dollars each equals 240 bucks for all the games, and 4 DLCs each for 20 bucks is 80 dollars. Each game then equals 140 bucks just to get to max level assuming they increase light level each DLC, multiply by 4 games and you'll spend 560 dollars to play the whole series in it's entirety over the 10 years."